/*********************************************************************************
 *                                                                               *
 * The MIT License (MIT)                                                         *
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 * Copyright (c) 2015-2022 aoju.org and other contributors.                      *
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 * all copies or substantial portions of the Software.                           *
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package org.aoju.bus.image.nimble;

/**
 * @author Kimi Liu
 * @version 6.5.0
 * @since Java 17+
 */
public enum ColorSubsampling {

    YBR_XXX_422 {
        @Override
        public int frameLength(int w, int h) {
            return w * h * 2;
        }

        @Override
        public int indexOfY(int x, int y, int w) {
            return (w * y + x) * 2 - (x % 2);
        }

        @Override
        public int indexOfBR(int x, int y, int w) {
            return (w * y * 2) + ((x >> 1) << 2) + 2;
        }
    },
    YBR_XXX_420 {
        @Override
        public int frameLength(int w, int h) {
            return w * h / 2 * 3;
        }

        @Override
        public int indexOfY(int x, int y, int w) {
            int withoutBR = y / 2;
            int withBR = y - withoutBR;
            return w * (withBR * 2 + withoutBR)
                    + ((y % 2 == 0) ? (x * 2 - (x % 2)) : x);
        }

        @Override
        public int indexOfBR(int x, int y, int w) {
            return w * (y / 2) * 3 + ((x >> 1) << 2) + 2;
        }
    };

    public abstract int frameLength(int w, int h);

    public abstract int indexOfY(int x, int y, int w);

    public abstract int indexOfBR(int x, int y, int w);

}
